I am essentially fully cashless at this point, I don't carry cash in my wallet or anything, but I still think it is incredibly important to have the option to use cash should I choose to. If for some reason I start getting rejected by banks, or dislike the restrictions that they are placing on me, it is a last resort that I can always fall back to. It prevents me from being fully dependent on private parties like banks, which I find valuable, even if I am unlikely to actually use it. I don't think that, as a society, we should be forcing people to hand over their private information to some bank in order to go through everyday life.